SCIENTIFIC TREATMENT OF THE ARBORETUM. 307 



describe an arboretum, or give directions for its forma- 

 tion, without reference to the scientific principles on 

 which its arrangement is based. We trust the reader 

 will not be repelled by the terminology, which it must 

 be owned has a sumewhat formidable look, but which 

 no one has ever imagined could be materially simpli- 

 fied, and at tlie same time retain its exactness. Even 

 the unbotanical reader, by running his eye along tho 

 English names, will be able to form a pretty correct 

 conception of the materials of which an arboretum is 

 composed. Persons about to undertake the execution 

 of such work will find in the following synopsis the 

 general outlines of an arrangement which they may 

 modify or abridge according to the special objects they 

 have in view. To those who may think our labor use- 

 less, we shall only say that we should have considered 

 a much slighter sketch a boon the first time we were 

 called to lay out an arboretum. 



As already stated, we prefer Dr. Lindley's arrange- 

 ment of the natural orders, as most suited for the 

 efiective adornment of an arboretum ; accordingly we 

 have borrowed the following syllabus of classification, 

 with some very slight modifications of the genera, 

 from the second edition of his "Vegetable Kingdom." 

 The reader who de&ires fuller information regarding 

 the alliances, orders, and genera, will find it amply 

 supplied in that admirable work. Of course, in regard 

 to the species, we must have recourse to books contain- 

 ing detailed descriptions, or to the larger catalogues 

 which have been published by Loudon and others. 

 Loudon's " Arboretum Britannicum " and " Eucyclo- 

 pffidia of Trees and Shrubs " may also be consulted 

 with advantage, or rather may be regarded as means 



